Software-Based Acoustical Measurements - Couverture souple
Livre 16 sur 20: Modern Acoustics and Signal Processing
Synopsis
Chapter 1. INTRODUCTION
1.1 Acoustical measurements
1.2 Instantaneous and effective (RMS) value
1.3 Sound pressure level
1.4 Equivalent level
1.4.1 Stabilization time for Leq
1.5 Weighted levels
1.6 Exceedance levels
1.6.1 Stabilization time for exceedance levels
1.7 Spectrum analysis
1.7.1 Constant percentage spectrum analyzer
1.7.2 Line spectrum analyzer
1.7.3 Line spectrum and time-frequency uncertainty
1.7.4 Line spectrum and power spectral density1.7.5 Band filters
1.7.6 Transient response of band filters
1.7.7 Parseval's identity
1.7.8 Effect of spectrum tolerance on Parseval's identity
1.7.9 Weighted levels computed from one-third octave bands
Chapter 2 UNCERTAINTY
2.1 Introduction
2.2 Resolution, precision, accuracy
2.3 Measurement method and procedure
2.3.1 Direct and indirect measurement methods2.4 Measurement model
2.5 Uncertainty
2.5.1 Type A Uncertainty
2.5.2 Type B uncertainty
2.5.3 Expanded uncertainty
2.5.4 Combined standard uncertainty
2.6 Examples
2.6.1 Relationship between uncertainties in level and pressure
2.6.2 Uncertainty in the correction of environmental conditions
2.6.3 Uncertainty in the calculation of the equivalent level
2.6.4 Uncertainty in A-weighting computed from octave spectrum
2.6.5 Uncertainty in the measurement of sound transmission loss
2.7 Uncertainty and resolution
2.8 Uncertainty and systematic error
2.8.1 Additive systematic error
2.8.2 Multiplicative systematic error2.8.3 Non linear systematic error
2.8.4 Uncorrected systematic errors
2.9 Chain calculation of uncertainty
Chapter 3 DIGITAL RECORDING
3.1 Introduction
3.2 Digital audio
3.3 Sampling
3.4 Digitization
3.5 Signal-to-noise ratio
3.6 Low-level distorsion
3.7 Dither
3.8 Jitter
3.9 D/A and A/D conversion
3.9.1 Digital / analog conversion
3.9.2 Analog / digital conversion
3.10 Pulse code modulation (PCM)
3.11 Differential pulse code modulation (DPCM)
3.12 Delta modulation (DM)
3.13 Sigma-delta modulation (SDM)
3.14 Digital recording devices
3.15 Sound file formats
3.15.1 WAV format
3.15.2 FLAC format
3.16 Project files
3.16.1 AUP format
3.16.2 AU format
3.16.3 AUF format
3.16.4 External access to audio data
3.17 Recording and storage media3.17.1 Hard disk
3.17.2 Flash memory
3.17.3 Optical discs
3.17.4 Digital audio tape (DAT)
3.18 File systems
3.18.1 FAT 32
3.18.2 NTFS
3.18.3 EXT4
3.18.4 HFS+
3.18.5 UDF
3.19 Long-term preservation
3.20 Conclusion
Chapter 4 DIGITAL AUDIO EDITING
4.1 Introduction
4.2 Audacity
4.2.1 Opening an existing file
4.2.2 Recoding sounds
4.2.3 Generating signals
4.2.4 Adding new tracks
4.2.5 Saving a project
4.2.6 Selection
4.2.7 Labels
4.2.8 Selection in the presence of labels
4.2.9 Calibration tone
4.2.10 FFT filters
4.2.11 Spectrogram and
Les informations fournies dans la section « Synopsis » peuvent faire référence à une autre édition de ce titre.
